---
title: selectionIsChangingNotification
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nstableview/selectionischangingnotification
---

# selectionIsChangingNotification

Posted as an NSTableView object’s selection changes (while the mouse button is still down).

## Declaration

```swift
class let selectionIsChangingNotification: NSNotification.Name
```

## Discussion

Discussion Note that the notification is sent only for mouse events that change the table’s selection, not keyboard events. The notification object is the table view whose selection is changing. This notification does not contain a userInfo dictionary. To observe this notification using Swift concurrency, use NSTableView.SelectionIsChangingMessage.

## See Also

### Notifications

- [columnDidMoveNotification](appkit/nstableview/columndidmovenotification.md)
- [columnDidResizeNotification](appkit/nstableview/columndidresizenotification.md)
- [selectionDidChangeNotification](appkit/nstableview/selectiondidchangenotification.md)